应用题 1.  请使用VC6或使用[答题]菜单打开考生文件夹proj2下的工程proj2，其中定义了vehicle类，并派生出motorcar类和bicycle类。然后以motorcar和bicycle作为基类，再派生出motorcycle类。要求将vehicle作为虚基类，避免二义性问题。请在程序中的横线处填写适当的代码并删除横线，以实现上述类定义。此程序的正确输出结果应为：
    80
    150
    100
    1
    注意：只能在横线处填写适当的代码，不要改动程序中的其他内容，也不要删除或移动“//****found****”。
    #include＜iostream. h＞
    class vehicle
    {
    private:
    int MaxSpeed;
    int Weight;
    public:
    //**********found**********
    vehicle(int maxspeed, int weight):______
    ～vehicle() {};
    int getMaxSpeed() {return MaxSpeed;}
    int getWeight() {return Weight;}
    };
    //**********found**********
    class bicycle:______public vehicle
    {
    private:
    int Height;
    public:
    bicycle(int maxspeed, int weight, int height): vehicle(maxspeed, weight), Height(height) {}
    int getHeight() {return Height;};
    };
    //**********found**********
    class motorcar:______public vehicle
    {
    private:
    int SeatNum;
    public:
    motorcar(int maxspeed, int weight, int seatnum): vehicle(maxspeed, weight), SeatNum(seatnum) {}
    int getSeatNum() {return SeatNum;};
    };
    //**********found**********
    class motorcycle:______
    {
    public:
    motorcycle(int maxspeed, int weight, int height): vehicle(maxspeed, weight), bicycle(maxspeed, weight, height), motorcar(maxspeed, weight, 1) {}
    };
    void main()
    {
    motorcycle a(80, 150, 100);
    cout＜＜a. getMaxSpeed()＜＜endl;
    cout＜＜a. getWeight()＜＜endl;
    cout＜＜a. getHeight()＜＜endl;
    cout＜＜a. getSeatNum()＜＜endl;
    }